電工鋼硅鋼片Electrical steel, also known as silicon steel sheet, is an indispensable metal material in the power, electronics, and military industries, and is also the largest functional material in production. It is mainly used as the iron core for various motors, generators, and transformers. Specific total loss (iron loss) is the total power consumed per unit mass of material when the magnetic polarization waveform remains sinusoidal, with a specific peak and frequency. The specific total loss is represented by the symbol P (Jm/f), in W/kg. Example: P1.5/50 represents the specific total loss at a maximum magnetic polarization intensity of 1.5T and a frequency of 50Hz. 3.2 Magnetic Polarization Q/BQB 480-20212 Magnetic polarization intensity refers to the peak magnetic polarization intensity of a specific magnetic field intensity when a sample is subjected to alternating magnetization. Its symbol is J (H), and the unit is T (Tesla). Example: J5000 represents the peak magnetic polarization intensity corresponding to a magnetic field intensity peak of 5000A/m. The material grades in this document are classified based on the nominal maximum specific total loss P1.5/50 (W/kg) at a magnetic polarization strength of 1.5T and a frequency of 50Hz, as well as the nominal thickness of the material. They are further divided into three categories based on product characteristics: ordinary type, stress relief annealing type, and high-efficiency type. Example 1: B35A210 represents a common non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 2.10W/kg； Example 2: B35AR300 represents a stress relieved annealed non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific total loss value P1.5/50 is 3.00W/kg； Example 3: B35AH230 represents an efficient non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. Example 4: 35WW210 represents a normal type WW non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.10W/kg. Example 5: 35WH230 represents an efficient WH non oriented electrical steel with a nominal thickness of 0.35mm, and the maximum nominal specific loss value P1.5/50 is 2.30W/kg. The classification and code of insulation coatings shall comply with the provisions of Table 2. Table 2 Classification and Code of Insulation Coatings Type Code Characteristics of Insulation Coatings Semi organic Thin Coating A Improves Punching Performance and Has Good Weldability Semi organic Thick Coating H has Good Punching Performance and High Interlayer Resistance Semi organic Chromium Free Thin Coating K does not contain chromium and has good weldability Semi organic Chromium Free Thick Coating M does not contain chromium and has good insulation performance Semi organic Chromium Free Extreme Thick Coating J does not contain chromium and has excellent insulation performance Semi organic Chromium Free Ultra Thick Coating L does not contain chromium and has extremely high insulation performance Self adhesive Coating

電工鋼硅鋼片：本文件的符號和相應(yīng)的說明見表1。表 1 符號和說明符號 單位 說明P W/kg 比總損耗，通常稱為鐵損P1.5/50 W/kg 磁極化強度在1.5T、安徽蚌埠附近頻率在50Hz下測得的比總損耗P1 W/kg 橫向試樣的比總損耗值P1.5/50 P2 W/kg 縱向試樣的比總損耗值P1.5/50 T1.5/50 ％ 比總損耗P1.5/50的各向異性H A/m 磁場強度J T 磁極化強度J1000 T 磁場強度峰值為1000A/m下測得的磁極化強度峰值J2500 T 磁場強度峰值為2500A/m下測得的磁極化強度峰值J5000 T 磁場強度峰值為5000A/m下測得的磁極化強度峰值J10000 T 磁場強度峰值為10000A/m下測得的磁極化強度峰值μ0 H/m 真空中的磁導(dǎo)率取4?×10-7 B T 磁感應(yīng)強度，B＝μ0H＋JReL MPa 下屈服強度Rm MPa 抗拉強度A ％ 斷后伸長率C Ω·cm2/面或Ω·mm2/面 表面絕緣電阻系數(shù)RA Ω·cm2/片或Ω·mm2/片 層間電阻系數(shù)